Question

x+x+x=30. xx+y=40 x+y+zz=60 z=?

Answer 1

x+x+x = 30
3x = 30
x = 30/3
x = 10
xx + y = 40
10X10 + y = 40
100 + y = 40
y = 40-100
y = -60
x+y+zz = 60
10 - 60 +zz = 60
-50 +zz = 60
zz = 110
z = $\sqrt{110}$
z = 10.48